Under the background of "carbon peak and carbon neutral", the future energy development will be transformed from single energy system to integrated energy system. With the development and application of electric vehicle network interaction technology and the significant improvement of flexible load ratio, the dispatchable resources in integrated energy system will become more abundant. In this context, the integrated energy system including electric vehicle battery swapping station and multi-type flexible load is taken as the research object. Firstly, the integrated energy system model including wind power, energy storage, combined heat and power unit, gas boiler and other equipment is constructed.Secondly, the charging and discharging characteristics of battery swapping station are taken into consideration in the integrated energy system optimization scheduling based on the flexible load responses of electricity, heat and gas. Taking the minimum operating cost of the system as the objective function, the integrated energy system optimization scheduling model considering flexible load and orderly charge and discharge of battery swapping station was established. Finally, the problem is modeled by Yalmip and solved by Cplex. The results show that the system operation cost is reduced by 13.04%, the wind power consumption rate is increased by 8.65%, and the load peak valley difference is reduced by 24.58%. The effectiveness of the proposed model in reducing the system operation cost, peak shaving and valley filling and wind power consumption is verified.